Divide the subnet and write out the data, the local IP is 192 168 25 7

To do subnet division, we must first know 2 formulas, one is to divide the number of subnets = 2 to the nth power in equal quantities, where n is the number of subnet network number bits divided, and the other is the nth power of the number of hosts that the subnet accommodates = 2 minus 2, where n is the number of bits of the subnet host number after division, and minus 2 is because all 0 (subnet network address) and all 1 (subnet broadcast address) of the subnet host number are removed. In addition, some old-fashioned books and textbook formulas also have to subtract 2, because at that time all 1 and all 0 subnets were not supported, and now they are supported, and generally do not need to subtract 2, and the things that have been eliminated are still turned out.

Now that you've turned it out, you're going to be old. Divide 6 subnets, to apply the old formula, 2 3-2 = 6, so the subnet number needs 3 digits, then the host number is 5 digits, the number of hosts in each subnet is 2 5-2 = 30, and the subnet mask is divided into.

Network address, broadcast address.

Network address, broadcast address.

Network address, broadcast address.

Network address, broadcast address.

Network address, broadcast address.

Network address, broadcast address.

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To divide it into 5 subnets, you need to borrow 3 host bits, because 2 3 = 8, which can be divided into 5 subnets. The process of division is as follows:

Convert the subnet mask to binary and get:

Borrow the 3-bit host bit and get a new subnet mask: , ie.

The five subnets are .

For each subnet, you can calculate information such as its subnet address, broadcast address, available host range, and so on. The subnet address is the first IP address in each subnet, the broadcast address is the last IP address in each subnet, and the host address is the other IP address after the subnet address and the broadcast address are removed.

For each subnet, the available host IP address range is all IP addresses between the subnet address plus 1 and the broadcast address minus 1.

Subnet 1 (: Subnet 2 (:

Subnet 3 (: Subnet 4 (:

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First of all, it belongs to the Class C IP, and the private Class C address ranges from to , and the default subnet mask of the Class C address is. It is divided into four subnets, which can only borrow 2 bits in the host bit, and 2 subnets in the host 2 as follows:

That is, the bitwise logic and the result of the operation is:

That is, the bitwise logic and the result of the operation is:

That is, the bitwise logic and the result of the operation is:

That is, the bitwise logic and the result of the operation is:

2) The subnet borrows the host 3 bits for subnet division;

3) Place the first 3 positions of the host address of the subnet mask of the class C address to 1 to get the subnet mask.

According to the structure of the IP address, the network number is 100, and the host number is 100; 2 Determine the subnet mask. To divide 7 subnets, a 3-bit subnet mask is required, so the subnet mask is; 3 Determine the network number and webcast address. According to the subnet mask, you can get the network number and network broadcasting address; 4.

Determine the subnet number. Starting from the network number, a total of 7 subnets are divided, and the host number segment of each subnet is 32, so the subnet numbers of the 7 subnets can be obtained: ,,5

The subnet is divided into IPv4 addresses and 7 networks.

To divide 7 subnets the day before, you need to use a 3-bit subnet mask, so the subnet mask is late; 3 Determine the network number and webcast address. According to the subnet mask, you can get the network number and network broadcasting address; 4.Determine the subnet number.

Starting from the network number, a total of 7 subnets are divided, and the host number segment of each subnet is 32, so the subnet numbers of the 7 subnets can be obtained: ,,5Determine the IP address range.

Class A subnet division.

Class A subnet division is an IP address division technology, which uses 8-bit binary Chi Song digits for division, in which the first digit is fixed as "0", the last 7 digits are used to represent the network number, and the last 24 digits are used to represent the main machine number. The advantage of Class A subnetting is that it can meet the needs of most small networks and can make efficient use of network resources. The disadvantage of Class A subnet division is that the number of valid networks in the network number is too small, and it can only represent 126 different networks, which limits its scope of application.

In addition, the Class A subnet division cannot support super subnets, so it cannot meet the needs of large networks.

The IP address range of five subnets is divided.

The IP representation range of 5 subnets is 3 Category A: Effective Network Orange Racket Range 1 126, IP Range, 24 Power of IP=2 for Each Network Segment-2 Class B: Effective Network Range, IP Range, 16 Power of IP=2 for Each Network Segment -2 Class C:

Effective network range, IP range, each network segment can be IP=2 to the 8th power -2 The host number of each network segment is all 0 to represent the network segment, and the host number is all 1 to represent the broadcast address, and it cannot be used as the host IP. Private IP address (not available on the Internet): Class A:

Category B: Category C: